Electrolytic solution for use in electrolytic capacitor and...

H - Electricity – 01 – G

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H01G 9/022 (2006.01) H01G 9/02 (2006.01)

Patent

CA 2307599

An electrolytic solution for use in an electrolytic capacitor, comprising a solution containing a solvent consisting of 20 to 80% by weight of an organic solvent and 80 to 20% by weight of water, and at least one electrolyte selected from the group consisting of a carboxylic acid or a salt thereof and an inorganic acid or a salt thereof, having added thereto at least one nitro compound selected from the group consisting of nitrophenol, nitrobenzoic acid, dinitrobenzoic acid, nitroacetophenone and nitroanisole. The electrolytic solution has a low impedance and excellent low-temperature stability, along with good working life characteristics, and it can also exhibit an excellent hydrogen gas absorption function when an electrolytic solution contains a highly increased amount of water in its mixed solvent or when an electrolytic capacitor is used under high temperature conditions.

L'invention concerne un électrolyte pour condensateur électrolytique, lequel électrolyte comprend un solvant renfermant de 20 à 80 % en poids d'un solvant organique contenant au moins un type d'électrolyte sélectionné dans le groupe constitué de l'acide carbonique, de ses sels, d'acides organiques, et de leurs sels, et un composé d'addition d'au moins un type de composé nitro sélectionné dans le groupe constitué du nitrophénol, de l'acide benzoïque, de l'acide dinitrobenzoïque, de la nitroacétophénone et du nitroanisole. L'électrolyte se caractérise par une faible impédance, d'excellentes caractéristiques à basses températures, et de bonnes caractéristiques de durée de vie. Même si l'électrolyte renferme un mélange de solvants à haute teneur en eau, et si le condensateur électrolytique est utilisé dans un environnement haute température, on obtient un excellent effet d'absorption de l'hydrogène gazeux.

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